Remove function

[anderson-joyle]

This pull request unifies the Remove functions between PFx and PA.

AI-generated description below:
This pull request introduces several changes to support new Remove/RemoveAll mutation function behaviors, adds a new enum type for remove flags, and updates localization and feature configuration. The most significant changes are grouped below.

Mutation Function Enhancements:

• Replaces the old RemoveFunction with new implementations: RemoveImpl and RemoveAllImpl, which both use a shared async core logic in MutationUtils.RemoveCore to handle record removal, including support for the "All" flag. (RemoveImpl, RemoveAllImpl, MutationUtils.cs) [1] [2] [3]
• Updates the internal logic for removing records to better handle errors and support both single-record and table-based removals, as well as the "All" option. (MutationUtils.cs)

Enum and Symbol Table Updates:

• Introduces a new enum, RemoveFlagsEnum, with values "First" and "All", and registers it in the enum store and language constants for use in mutation functions. (BuiltInEnums.cs, EnumStoreBuilder.cs, LanguageConstants.cs) [1] [2] [3] [4]
• Ensures the EnumStoreBuilder is initialized before adding functions that require enums, preventing possible null reference issues. (SymbolTable.cs)

Feature Flags and Configuration:

• Adds a new internal feature flag, IsRemoveAllDelegationEnabled, to control RemoveAll delegation behavior, and ensures it is included in feature copying and default feature sets. (Features.cs) [1] [2] [3]

Localization and Error Handling:

• Updates string resources and error keys to support new Remove/RemoveAll argument names and error messages, including new error keys for collection and argument validation. (Strings.cs) [1] [2] [3]
• Improves error reporting in RemoveAsync by omitting unnecessary error messages when a record is not found. (CollectionTableValue.cs)

Miscellaneous:

• Removes an unused using System.Collections.Generic; directive from IExternalDocumentProperties.cs for cleanup.

[jas-valgotar]

✅ No public API change.

[jas-valgotar]

✅ No public API change.

[jas-valgotar]

✅ No public API change.

[jas-valgotar]

✅ No public API change.